Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| Challenger Taipei | 2018/04/11 03:00 | Laurynas Grigelis v Tatsuma Ito | 7-6,4-6,3-6 |
| Davis Cup | 2018/04/08 12:15 | Emil Ruusuvuori v Laurynas Grigelis | 7-5,6-2 |
| Davis Cup | 2018/04/07 13:00 | Harri Heliovaara v Laurynas Grigelis | 6-3,1-6,6-3 |
| Challenger St Brieuc | 2018/03/27 13:05 | Laurynas Grigelis v Stephane Robert | 4-6,6-7 |
| Challenger St Brieuc Qual | 2018/03/26 08:30 | Laurynas Grigelis v Tak Khunn Wang | 3-6,6-3,7-6 |
| Challenger St Brieuc Qual | 2018/03/25 11:45 | Laurynas Grigelis v Jonathan Kanar | 6-1,6-3 |
| Challenger St Brieuc Qual | 2018/03/24 15:10 | Laurynas Grigelis v Mick Lescure | 6-7,6-2,6-0 |
| Challenger Lille | 2018/03/22 18:45 | Laurynas Grigelis v Antoine Hoang | 4-6,6-2,4-6 |
| ATP Houston Qual | 2018/04/07 21:15 | Mitchell Krueger v Darian King | 7-5,6-3 |
| Challenger Panama City | 2018/04/03 16:00 | Ante Pavic v Darian King | 6-1,6-4 |
| Challenger Le Gosier | 2018/03/29 18:00 | Dusan Lajovic v Darian King | 6-3,6-4 |
| Challenger Le Gosier | 2018/03/28 20:45 | Darian King v Tom Jomby | 6-7,6-1,6-2 |
| ATP Miami | 2018/03/22 15:00 | Nicola Kuhn v Darian King | 7-6,6-4 |
| ATP Miami Qual | 2018/03/20 14:00 | Darian King v Mackenzie McDonald | 2-6,6-4,6-4 |
| ATP Miami Qual | 2018/03/19 14:00 | Roberto Carballes Baena v Darian King | 6-2,2-6,4-6 |
| ATP Indian Wells Qual | 2018/03/06 23:30 | Ricardas Berankis v Darian King | 6-3,6-2 |